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Chemistry Paper 33 Purity% answer of CaCO3 and what were the metal and anions

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Anyone knows the answer to the question whether increasing mass of CaCO3 will give more accurate results?
 
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Anyone knows the answer to the question whether increasing mass of CaCO3 will give more accurate results?

Increasing the mass(m) of limestone lowers the % error; here's how:

% error = d(m) * 100 ;
clever,eh?...m

[the %purity was inferred in a similar way, i.e. by sectioning the imperial mass with the total mass of CaCO3] :)
 
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I just did the tables of titration in pencil. Will they reject that? All the rest of the paper is in pen.
 
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I just did the tables of titration in pencil. Will they reject that? All the rest of the paper is in pen.

No, not if you've written the titer value in ink on the space provided: .............. cm^3 of FA1 reacted with 25.0 cm^3 of FA3/FA5. You're safe.:)
 
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Increasing the mass(m) of limestone lowers the % error; here's how:

% error = d(m) * 100 ;
clever,eh?...m

[the %purity was inferred in a similar way, i.e. by sectioning the imperial mass with the total mass of CaCO3] :)
hmm..that was good thinking, now i think i have got my answer wrong :(
 
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Hey Guys...if a person get A in P1 and P2 but B or C in P3........what would be the overall grade?
 
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Increasing the mass(m) of limestone lowers the % error; here's how:

% error = d(m) * 100 ;
clever,eh?...m

[the %purity was inferred in a similar way, i.e. by sectioning the imperial mass with the total mass of CaCO3] :)

yeah, i said yes, and i was thinking the same thing. =)
 
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My purity was 90 %. my titration results were very precise.
all my question 2 except the observations was left. As the time finished.

It pains me to discuss past paper. till now I have had bad luck in all paper. Though I had full prepration.
 
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222
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Increasing the mass(m) of limestone lowers the % error; here's how:

% error = d(m) * 100 ;
clever,eh?...m

[the %purity was inferred in a similar way, i.e. by sectioning the imperial mass with the total mass of CaCO3] :)

Yay :D I wrote the same thing *victory dance*
 
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